Daily exercise is a textbook that is particularly close to the textbook. The questions are particularly rich and the difficulty is slightly higher. This is a better exercise for children's thinking ability, and the content analysis is particularly good. The induction manual contained in it is even better, summarizing the essence of a book. There is a difference in practicing the annual edition every day, because the textbooks will change slightly every year, so the topics will be different. Although the textbooks are not synchronized, they are all the same.